DE13074C - Temperature regulation on spring manoometers and barometers with indicating liquid - Google Patents
Temperature regulation on spring manoometers and barometers with indicating liquidInfo
- Publication number
- DE13074C DE13074C DENDAT13074D DE13074DA DE13074C DE 13074 C DE13074 C DE 13074C DE NDAT13074 D DENDAT13074 D DE NDAT13074D DE 13074D A DE13074D A DE 13074DA DE 13074 C DE13074 C DE 13074C
- Authority
- DE
- Germany
- Prior art keywords
- liquid
- spring
- air
- barometers
- manoometers
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000007788 liquid Substances 0.000 title claims description 19
- 239000011521 glass Substances 0.000 description 2
- 230000003247 decreasing Effects 0.000 description 1
- 230000001627 detrimental Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L7/00—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements
- G01L7/18—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements using liquid as the pressure-sensitive medium, e.g. liquid-column gauges
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/04—Means for compensating for effects of changes of temperature, i.e. other than electric compensation
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Description
1880.1880.
Klasse 42.Class 42.
HERM. CARL HERBECK in ELBERFELD. Temperaturregulator an Federmano- und Barometern mit anzeigender Flüssigkeit.HERM. CARL HERBECK in ELBERFELD. Temperature regulator on spring manometers and barometers with indicating liquid.
Patentirt im Deutschen Reiche vom 13. Juli 1880 ab.Patented in the German Empire on July 13, 1880.
Das Instrument besteht aus einer federnden Dose α, welche durch eine Feder b in Thätigkeit gehalten wird.The instrument consists of a resilient box α which is kept in action by a spring b.
An die Dose setzt sich eine Glasröhre c, welche in das verschlossene Luftgefäfs d endigt, das von einem eine Flüssigkeit enthaltenden Gefäfse e umgeben ist. Die Dose und ein Theil der Glasröhre sind mit einer Flüssigkeit gefüllt, deren Stand dem Drucke entsprechend auf einer Scala abgelesen werden kann, wenn der Temperatureinflufs wirkungslos gemacht ist.A glass tube c is attached to the can, which ends in the closed air vessel d , which is surrounded by a vessel e containing a liquid. The jar and part of the glass tube are filled with a liquid, the level of which can be read on a scale according to the pressure when the temperature influence is rendered ineffective.
Bei zunehmender Temperatur wird sich die Luft in dem Gefäfse d ausdehnen, desgleichen die Flüssigkeit. Die Luft hat aber den gröfseren Ausdehnungscoefficienten und würde deshalb die Flüssigkeit, welche die Luft zusammenpressen will, so lange nach unten drücken, bis Gleichgewicht hergestellt ist. Nimmt man aber das Luftvolumen d in einem ganz bestimmten, durch Versuche festgestellten Verhältnifs zum Flüssigkeitsvolumen α kleiner, so drückt die Luft bei zunehmender Temperatur ebenso intensiv nach unten, wie die Flüssigkeit nach oben, und so bleibt der Stand der Flüssigkeit unverändert.As the temperature rises, the air in the vessel d will expand, as will the liquid. However, the air has the larger coefficient of expansion and would therefore press the liquid which wants to compress the air downwards until equilibrium is established. But if one takes the air volume d smaller in a very specific ratio to the liquid volume α determined by experiments, then the air presses downward just as intensely as the liquid increases with increasing temperature, and so the level of the liquid remains unchanged.
Bei abnehmender Temperatur ziehen sich Luft und Flüssigkeit zusammen, die letztere, welche infolge dessen sinken würde, bleibt aber stehen, denn bei dem bestimmten Verhältnifs von a : d hat der Luftdruck auf die Flüssigkeit sich entsprechend vermindert.When the temperature decreases, the air and the liquid contract, the latter, which would sink as a result, remains, for at the given ratio of a: d the air pressure on the liquid has correspondingly decreased.
Es könnte nun aber ein plötzlicher Temperaturwechsel doch eine vorübergehende Schwankung des Flüssigkeitsspiegels verursachen; denn die Luft wird den Temperaturunterschied zuerst empfinden, ehe noch die Flüssigkeit davon berührt worden ist.A sudden change in temperature could be a temporary fluctuation cause of the liquid level; because the air gets the temperature difference first feel before the liquid has been touched.
Dieser Uebelstand ist nun dadurch beseitigt, dafs das Luftgefäfs mit einem Flüssigkeitsgefäfs derart umgeben ist, dafs die Temperatur infolge dessen gleichmäfsig auf Luft und Flüssigkeit einwirkt, und zwar, wie vorstehend dargelegt, ohne nachtheiligen Einflufs auf den Stand der Flüssigkeit, der nun das Mafs für den Druck auf das Instrument darstellt.This inconvenience is now eliminated by the fact that the air vessel with a liquid vessel is surrounded in such a way that, as a result, the temperature is uniform on air and liquid acts, and that, as stated above, without detrimental influence on the state of Liquid, which is now the measure for the pressure on the instrument.
Claims (1)
Publications (1)
Publication Number | Publication Date |
---|---|
DE13074C true DE13074C (en) |
Family
ID=290253
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DENDAT13074D Active DE13074C (en) | Temperature regulation on spring manoometers and barometers with indicating liquid |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE13074C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3940991A (en) * | 1973-02-08 | 1976-03-02 | Rudiger Gunttner | Barometer gas pressure measuring apparatus |
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0
- DE DENDAT13074D patent/DE13074C/en active Active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3940991A (en) * | 1973-02-08 | 1976-03-02 | Rudiger Gunttner | Barometer gas pressure measuring apparatus |
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